/*
 * Copyright (C) 2018 Facebook, Inc.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package com.facebook.stats.concurrent;

import java.time.Clock;
import java.time.Instant;
import java.time.ZoneId;
import java.time.ZonedDateTime;
import java.time.temporal.ChronoUnit;

class MockClock extends Clock {
  private ZonedDateTime now;

  MockClock(ZonedDateTime now) {
    this.now = now;
  }

  @Override
  public Instant instant() {
    return now.toInstant();
  }

  @Override
  public ZoneId getZone() {
    throw new UnsupportedOperationException();
  }

  @Override
  public Clock withZone(ZoneId zone) {
    throw new UnsupportedOperationException();
  }

  void advanceMillis(int millis) {
    now = now.plus(millis, ChronoUnit.MILLIS);
  }
}
